Journal articles: 'Vitamine B1'

1

Giesberts, Marion. "Thiamine (vitamine B1)." Nursing 22, no. 9 (September 2016): 35. http://dx.doi.org/10.1007/s41193-016-0147-6.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Ferrary, Ophélie, Claude Hercend, Katell Peoc’h, and Agnès Dauvergne. "La vitamine B1 : la première vitamine identifiée." Revue Francophone des Laboratoires 2019, no. 514 (July 2019): 45–54. http://dx.doi.org/10.1016/s1773-035x(19)30328-4.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Djukic, Marija, and Christine A. F. von Arnim. "B-Vitamine in der Geriatrie – was bestimmen, was ersetzen?" Aktuelle Ernährungsmedizin 46, no. 05 (October 2021): 312–16. http://dx.doi.org/10.1055/a-1449-1786.

Full text

Abstract:

ZusammenfassungEin Vitamin-B1-Mangel kann sich als Wernicke-Enzephalopathie oder als Beriberi manifestieren. Geriatrische Patienten mit den Diagnosen Demenz oder Delir haben niedrigere Vitamin-B1-Spiegel als solche ohne diese Diagnosen. Ebenso zeigen sich bei geriatrischen Patienten mit höherem Vitamin-B1-Spiegel bessere Ergebnisse in der Funktionalität (Barthel-Index) bei Entlassung. Vitamin B6 ist an über 100 Reaktionen als Koenzym beteiligt und ein Mangel kann daher mit vielen Symptomen einhergehen. Klinische Manifestationen des Vitamin-B12-Mangels reichen von frühen neuropsychiatrischen bis zu hämatologischen Symptomen, wobei die makrozytäre Anämie als später Indikator eines Vitamin-B12-Mangels gilt. Neurologische Symptome treten sehr häufig schon vor oder ohne hämatologische Manifestationen auf. Die Bestimmung des Vitamin-B1-Spiegels im Blut ist wenig aussagekräftig. Die Wernicke-Enzephalopathie ist eine klinische Diagnose. Zur Diagnose eines Vitamin-B6-Mangels wird die Bestimmung von Pyridoxin (Pyridoxal-5′-Phosphat) im Plasma empfohlen. Ein erniedrigter Holo-TC-Spiegel im Serum gilt als frühester Marker eines Vitamin-B12-Mangels. Eine kombinierte Bestimmung von Vitamin B12, Holo-TC, MMA und Homozystein scheint die diagnostische Zuverlässigkeit bei Vitamin-B12-Mangel zu erhöhen. Für Empfehlungen zur Substitutionstherapie bei allen B-Vitaminen liegen kaum bzw. keine evidenzbasierten Daten vor. Durch die Substitution von 0,8 mg Folsäure, 0,5 mg Vitamin B12 und 20 mg Vitamin B6 konnte in einer randomisierten kontrollierten Studie bei Patienten mit einer leichten kognitiven Störung eine Verlangsamung der Hirnatrophie bewirkt werden.

APA, Harvard, Vancouver, ISO, and other styles

4

Djukic, Marija, and Christine A. F. von Arnim. "B-Vitamine in der Geriatrie – was bestimmen, was ersetzen?" DMW - Deutsche Medizinische Wochenschrift 146, no. 03 (January 29, 2021): 152–56. http://dx.doi.org/10.1055/a-1210-5030.

Full text

Abstract:

Was ist neu? Klinische Manifestation eines B-Vitamin-Mangels Ein Vitamin-B1-Mangel kann sich als Wernicke-Enzephalopathie oder als Beriberi manifestieren. Geriatrische Patienten mit den Diagnosen Demenz oder Delir haben niedrigere Vitamin-B1-Spiegel als solche ohne diese Diagnosen. Ebenso zeigen sich bei geriatrischen Patienten mit höherem Vitamin-B1-Spiegel bessere Ergebnisse in der Funktionalität (Barthel-Index) bei Entlassung. Vitamin B6 ist an über 100 Reaktionen als Koenzym beteiligt und ein Mangel kann daher mit vielen Symptomen einhergehen. Klinische Manifestationen des Vitamin-B12-Mangels reichen von frühen neuropsychiatrischen bis zu hämatologischen Symptomen, wobei die makrozytäre Anämie als später Indikator eines Vitamin-B12-Mangels gilt. Neurologische Symptome treten sehr häufig schon vor oder ohne hämatologische Manifestationen auf. Diagnostik von B-Vitamin-Mangelzuständen Die Bestimmung des Vitamin-B1-Spiegels im Blut ist wenig aussagekräftig. Die Wernicke-Enzephalopathie ist eine klinische Diagnose. Zur Diagnose eines Vitamin-B6-Mangels wird die Bestimmung von Pyridoxin (Pyridoxal-5′-Phosphat) im Plasma empfohlen. Ein erniedrigter Holo-TC-Spiegel im Serum gilt als frühester Marker eines Vitamin-B12-Mangels. Eine kombinierte Bestimmung von Vitamin B12, Holo-TC, MMA und Homozystein scheint die diagnostische Zuverlässigkeit bei Vitamin-B12-Mangel zu erhöhen. Therapie Für Empfehlungen zur Substitutionstherapie bei allen B-Vitaminen liegen kaum bzw. keine evidenzbasierten Daten vor. Durch die Substitution von 0,8 mg Folsäure, 0,5 mg Vitamin B12 und 20 mg Vitamin B6 konnte in einer randomisierten kontrollierten Studie bei Patienten mit einer leichten kognitiven Störung eine Verlangsamung der Hirnatrophie bewirkt werden.

APA, Harvard, Vancouver, ISO, and other styles

5

Jesse, S., and A. C. Ludolph. "Die Vitamine B1, B6 und B12." Der Nervenarzt 83, no. 4 (January 11, 2012): 521–34. http://dx.doi.org/10.1007/s00115-011-3425-1.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Wachsmuth, H. "Volumetrische Semimicro- en Microbepaling van Vitamine B1." Bulletin des Sociétés Chimiques Belges 56, no. 5-8 (September 1, 2010): 261–67. http://dx.doi.org/10.1002/bscb.19470560508.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Gargot, T., and N. Bouaziz. "Évolution favorable d’un cas de syndrome de Wernicke et Korsakoff en secteur de psychiatrie." European Psychiatry 29, S3 (November 2014): 530. http://dx.doi.org/10.1016/j.eurpsy.2014.09.386.

Full text

Abstract:

Le syndrome de Wernicke est caractérisé par un syndrome confusionnel, une paralysie oculomotrice, une ataxie cérébelleuse. Il serait secondaire à une carence en vitamine B1 souvent liée à une carence d’origine alcoolique. Le syndrome de Korsakoff est une complication du syndrome de Wernicke auquel s’ajoutent des troubles de la mémoire antérograde, des fabulations, des fausses reconnaissances et une polyneuropathie. Classiquement, le syndrome de Korsakoff est considéré de mauvais pronostic. Qu’apporte une prise en charge bio-psychosociale de ces troubles en secteur de psychiatrie ? Nous rapportons le cas d’un patient hospitalisé pour une tentative de suicide sans alcoolo-dépendance connue. Quelques jours après son admission, il présente un syndrome confusionnel, une paralysie oculomotrice, une ataxie cérébelleuse, une amnésie antérograde, des fabulations, des fausses reconnaissances et une polyneuropathie des membres inférieurs. Un diagnostic de syndrome de Wernicke compliqué de syndrome de Korsakoff a été posé. Par ailleurs, apparaissent une humeur dépressive, une alcoolo-dépendance niée, un délire confuso-onirique, une décompensation d’hypertension artérielle, diabétique et une hyperexcitabilité auriculaire. Des dosages montrent des carences en 25-OH vitamine D et en vitamine B9. Le dosage de la vitamine B1 est normal. Il reçoit des benzodiazépines à l’admission. En phase aiguë, il reçoit des vitamines B1, B6, D et B9. Après amélioration, il est traité par de la fluoxétine et de l’acamprosate. L’imagerie cérébrale après rémission ne montre pas d’atteinte des corps mamillaires. Un suivi psychométrique par mini mental state examination, un test de l’horloge et un test des 5 mots de Dubois a montré une normalisation. Après rémission, nous avons utilisé une approche psychothérapeutique motivationnelle. Une lourde prise en charge sociale axée sur la réinsertion a été nécessaire. Le syndrome de Korsakoff pris à un stade précoce ne serait pas toujours de mauvais pronostic. Une vision bio-psycho-sociale semble pertinente dans ces pathologies.

APA, Harvard, Vancouver, ISO, and other styles

8

Dervaux, Alain, and Xavier Laqueille. "Le traitement par thiamine (vitamine B1) dans l’alcoolodépendance." La Presse Médicale 46, no. 2 (March 2017): 165–71. http://dx.doi.org/10.1016/j.lpm.2016.07.025.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Quilliot, Didier, Niasha Michot, Laurent Brunaud, and Aurélie Malgras. "Déficit en vitamine B1 : comment prévenir et traiter." Nutrition Clinique et Métabolisme 31, no. 3 (September 2017): 176–80. http://dx.doi.org/10.1016/j.nupar.2017.06.010.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Marciniak, B. "Photophysical and Photochemical Properties of Some Fluorescent Derivatives of Vitamin B1." Zeitschrift für Naturforschung A 42, no. 5 (May 1, 1987): 485–89. http://dx.doi.org/10.1515/zna-1987-0510.

Full text

Abstract:

Absorption and emission spectra, depopulation kinetics of the lowest excited singlet and triplet states and acid-base equilibria of two fluorescent vitamin B, derivatives, the products I and II of the reaction of N-methylated vitamine B, with cytidine and adenosine, respectively, were investigated. Analysis of the lifetime and quantum yield data indicate that at 77 K emissions are the main processes of deactivation of the S1 and T1 states for the free ion and protonated forms. The pKa values indicate a much higher acidity in the excited singlet and triplet states than in the ground state. I and II undergo very slow photochemical reactions in solution in the presence of oxygen (Φ ~ 10-4).

APA, Harvard, Vancouver, ISO, and other styles

11

Häussler, Ulrich, Reimer Riessen, and Michael Haap. "Spielen Vitamine bei der Pathogenese und Therapie der Sepsis eine Rolle?" DMW - Deutsche Medizinische Wochenschrift 143, no. 20 (October 2018): 1450–54. http://dx.doi.org/10.1055/a-0661-1112.

Full text

Abstract:

Was ist neu? Vitamin B1 (= Thiamin) Beim septischen Schock weisen erste Studien mit relativ kleinen Fallzahlen auf positive Effekte einer frühzeitigen Vitamin-B1-/Thiamin-Substitution in Bezug auf Laktatclearance, Nierenfunktion und Letalität, insbesondere bei Patienten mit Thiaminmangel hin. Da ein Thiaminmangel bei Intensivpatienten häufig ist, sollte eine Thiamin-Substitution in ausreichender Dosierung bei allen Sepsispatienten mit Laktatazidose erwogen werden. Vitamin C Vitamin C besitzt multiple biologische Funktionen, die sich im Rahmen einer Sepsis günstig auswirken könnten. Die Applikation von hochdosiertem Vitamin C in Kombination mit Thiamin und Hydrokortison war in einer viel diskutierten, 2017 veröffentlichten klinischen Studie mit einer drastischen Senkung der Sepsisletalität assoziiert. In mehreren prospektiven randomisierten Studien wird die Wirksamkeit dieses Therapiekonzepts derzeit unabhängig voneinander überprüft. Vitamin D Auch der Einsatz von Vitamin D3 bei der Sepsis ist aus pathophysiologischer Sicht insbesondere bei Mangelzuständen ein vielversprechender Ansatz, allerdings ist der Wert einer therapeutischen Substitution derzeit noch nicht gesichert.

APA, Harvard, Vancouver, ISO, and other styles

12

JEAN-BLAIN, C., and L. ALVES de OLIVEIRA. "Aspects physio-pathologiques de la thiamine (vitamine B1) chez les ruminants." INRAE Productions Animales 7, no. 2 (April 24, 1994): 71–84. http://dx.doi.org/10.20870/productions-animales.1994.7.2.4158.

Full text

Abstract:

Cette revue envisage d’abord la production microbienne, l’absorption et l’utilisation métabolique de la thiamine chez le ruminant sain ainsi que les effets d’une synthèse insuffisante de thiamine sur l’activité microbienne du rumen. Elle fait ensuite une analyse critique des données à la fois classiques et récentes concernant l’étiologie et la pathogénie de la nécrose du cortex cérébral (NCC). Les facteurs impliqués dans la synthèse et la dégradation de la thiamine dans les conditions normales d’alimentation sont relativement bien connus. Il n’en va pas de même des facteurs qui sont responsables de la diminution de la production nette de thiamine dans le rumen ou de son absorption, dans des conditions de sous- ou de suralimentation ou avec des régimes déséquilibrés. La pathogénie classique de la nécrose du cortex met en jeu la surproduction de thiaminases de type I. Cette théorie n’est cependant pas entièrement satisfaisante ; en effet la micropopulation du rumen a normalement une activité thiaminasique globale très faible qu’il est impossible de faire évoluer expérimentalement à l’heure actuelle. L’excès de soufre dans la ration peut également induire l’apparition de lésions typiques de NCC. Dans ce cas la relation avec la thiamine n’est pas évidente. Il est probable que l’on a à faire à deux étiologies complètement différentes qui s’expriment par le même type de lésions.

APA, Harvard, Vancouver, ISO, and other styles

13

Madieta, L. "Physiopathologie du Shoshin Béribéri : une complication mortelle du déficit en vitamine B1." French Journal of Psychiatry 1 (December 2019): S97—S98. http://dx.doi.org/10.1016/j.fjpsy.2019.10.312.

Full text

APA, Harvard, Vancouver, ISO, and other styles

14

Ahadi, Muhammad Yanuar, Deby Wahyuning Hadi, Soemarno Soemarno, and Evi Octavia. "A Case Report of Parkinson’s Disease in a 70 year Man With Myasthenia Gravis." Journal of Islamic Pharmacy 5, no. 2 (December 11, 2020): 5–8. http://dx.doi.org/10.18860/jip.v5i2.8813.

Full text

Abstract:

AbstractBackground:. Neurodegenerative diseases such as Parkinson’s disease (PD) have increasing incidence, due to lifespan expansion. The association between PD and Myasthenia Gravis (MG) is uncommon, and so far, since 1987, 26 cases have been reported.Case presentation: This is a report of a 70-year-old man was referred into the hospital with ptosis, disfagia and dispnea. He was diagnosed with Suspected Myasthenia Gravis, Post Stroke Trombotik, Parkinson’s Disease and Hypertension. The patient was admitted to the outpatient unit, received of treatment Pyridostigmine, Clopidogrel, Trihexylphenidil, Vitamine B1, Vitaminie B6, Vitamine B12 and Levodopa-Benserazide .Discussion: Treatment guidelines by using some guidelines are also drug doses and do not have adverse side reactions during treatment.Conclusion:. PD and MG very rarely occur together. case report or a series of brief cases reported in the literature, it is very important not to miss the diagnosis of MG in patients with PD, because the treatment implications are very important and greatly influence the prognosis. More basic research needs to be done to understand the pathogenesis of both diseases, to provide more therapeutic options and possibly change the approach of the patient, whose quality of life is determined by these two neurological diseases, which have an increased impact on increasing disabilityKey words: Parkinson disease; Myasthenia gravis; co‐occurrence; case report.

APA, Harvard, Vancouver, ISO, and other styles

15

Delatour, C., M. Subiros, F. Parenton, L. Filleur, A. Chamouine, and H. Youssouf. "126 - Le déficit en thiamine (vitamine B1) toujours endémique à Mayotte en 2021." Revue d'Épidémiologie et de Santé Publique 70 (August 2022): S159. http://dx.doi.org/10.1016/j.respe.2022.06.085.

Full text

APA, Harvard, Vancouver, ISO, and other styles

16

Domenech, Joseph, M. Wyers, J. P. Braun, and Pierre Formenty. "Le syndrome nerveux des ovins en Côte-d'Ivoire. I. Etude épidémiologique et clinique, méthodes de diagnostic et traitement." Revue d’élevage et de médecine vétérinaire des pays tropicaux 46, no. 3 (March 1, 1993): 423–29. http://dx.doi.org/10.19182/remvt.9431.

Full text

Abstract:

Le “syndrome nerveux des ovins” en Côte-d’Ivoire est assimilable à la “nécrose du cortex cérébral” (NCC) due à une carence en vitamine B1. Tous les symptômes classiques de la NCC ont été observés (ataxie locomotrice suivie de paralysies) et les lésions histologiques de polioencéphalomalacie ont été mises en évidence. En revanche, les circonstances d’apparition de la maladie sont très différentes dans les deux cas : si la NCC est une maladie des jeunes ruminants à l’engrais dans les pays développés, le syndrome nerveux des ovins se manifeste essentiellement, en Côte-d’lvoire, durant la saison sèche, lorsque le pâturage devient sec et rare et que la complémentation alimentaire est insuffisante. La cause principale, relativement univoque, est donc représentée par une dégradation brutale de la valeur nutritionnelle de la ration alimentaire, mais l’étiopathogénie précise de la maladie reste inconnue. Dans un troupeau atteint, 10 à 30 % des animaux peuvent être malades et 80 à 90 % d’entre eux vont mourir. Sur le plan du diagnostic, aucune épreuve biochimique classique n’est suffisamment spécifique pour être retenue pour une confirmation formelle du syndrome nerveux. Il faut cependant signaler que les CK (créatinine kinase) sont très régulièrement augmentées et que les ASAT (aspartate aminotransférase) sont élevées dans 75 % des cas. Le diagnostic formel reste donc basé, dans les conditions actuelles pratiques de terrain en Afrique, sur l’efficacité du traitement avec la vitamine B1 et, pour l’animal mort, sur l’analyse histologique du cerveau.

APA, Harvard, Vancouver, ISO, and other styles

17

Bartoszyk, G. D. "Zur Wechselwirkung der Vitamine B1, B6, B12 mit nichtsteroidalen Antirheumatika und Analgetika: Tierexperimentelle Befunde." Klinische Wochenschrift 68, no. 2 (January 1990): 121–24. http://dx.doi.org/10.1007/bf01646859.

Full text

APA, Harvard, Vancouver, ISO, and other styles

18

Gauch, Roland, Urs Leuenberger, and Urs M�ller. "Bestimmung der wasserl�slichen Vitamine B1, B2, B6 und B12 in Milch durch HPLC." Zeitschrift f�r Lebensmittel-Untersuchung und -Forschung 195, no. 4 (October 1992): 312–15. http://dx.doi.org/10.1007/bf01187905.

Full text

APA, Harvard, Vancouver, ISO, and other styles

19

GRAULET, Benoît. "Récentes avancées sur les facteurs de variation des concentrations en vitamines du lait chez les ruminants." INRAE Productions Animales 35, no. 2 (August 26, 2022): 139–54. http://dx.doi.org/10.20870/productions-animales.2022.35.2.7080.

Full text

Abstract:

Les vitamines sont des nutriments essentiels au bon fonctionnement des cellules des mammifères mais celles-ci ne sont généralement pas capables de les synthétiser, ou pas en quantité suffisante pour couvrir les besoins de l’organisme entier. Elles participent à la plupart des fonctions biologiques cellulaires et à tous les stades physiologiques des individus. Il est important que les besoins spécifiques soient couverts par des apports nutritionnels réguliers, les capacités de stockage corporel étant parfois très limitées. Les études épidémiologiques indiquent cependant que tel ne serait pas le cas. En plus des pathologies symptomatiques bien connues des carences en chacune des vitamines (comme la xérophtalmie résultant de la carence en vitamine A), il est de plus en plus mis en lumière des liens entre ces apports subcliniques et les risques de développement de maladies en particulier avec l’âge. Les produits animaux de ruminants, les produits laitiers en particulier, peuvent être des sources d’apport intéressantes compte tenu des quantités qu’ils contiennent, de la biodisponibilité de celles-ci, de leur consommation régulière, que ce soit au niveau quotidien ou annuel, de leur bonne accessibilité (coût, transport, stockage). Cependant, les éléments de caractérisation des teneurs en vitamines dans ces produits sont encore loin d’être complets. Certaines vitamines n’ont pour le moment pas été étudiées (D, K, B1, B3, B5, B8 et C), quelques facteurs de variation ont été décrits pour les autres. Les ruminants au pâturage semblent ainsi produire des laits plus riches en vitamines (A, E, B2, B9) qu’avec les autres modes d’alimentation, mais cela s’avère être au détriment de la vitamine B12 pour laquelle les produits laitiers ont un rôle pourvoyeur important dans la nutrition humaine. Une connaissance plus approfondie des relations qualitatives et quantitatives entre les conditions de production (espèces, races, nature de l’alimentation en particulier) permettrait à termes de proposer les moyens de produire des laits et des produits laitiers dont les apports en vitamines pourraient être optimisés.

APA, Harvard, Vancouver, ISO, and other styles

20

Talaboulma, Imene, L. Maguenouche, Salma Aouadj, Bouguerra Imene, Abdelghani Zellagui, and Samira Makri-Mokrane. "De la thiamine pour avoir bonne mine : déficit en vitamine B1 : à propos de 3 cas." Revue Neurologique 177 (April 2021): S26. http://dx.doi.org/10.1016/j.neurol.2021.02.136.

Full text

APA, Harvard, Vancouver, ISO, and other styles

21

Müller, Nikolaus. "Thiaminpyrophosphat – ein natürlich vorkommendes Iminium-Salz. Seine Bedeutung für die mikrobiellen Prozesse bei der Weinbereitung und die Aromabildung im Wein / Thiamine Diphosphate – A Natural Iminium Salt. Its Role in Microbiological Processes During Wine Preparation and on the Aroma of Wine." Zeitschrift für Naturforschung B 69, no. 5 (May 1, 2014): 489–500. http://dx.doi.org/10.5560/znb.2014-4052.

Full text

Abstract:

Iminium salt structures are widespread in nature and play an important role in biochemical processes. Among these thiamine diphosphate (ThPP, Vitamine B1) is one of the best known examples. It serves as a cofactor in a variety of different enzymes that are found in all forms of life. During fermentation for the production of alcoholic beverages, ThPP is of great importance not only for the key step (decarboxylation of pyruvate), but also for the formation of secondary metabolites which highly influence the aroma of wine. Thus, enzymatic degradation of amino acids in yeasts via the Ehrlich pathway delivers higher alcohols, fatty acids and esters. In malolactic fermentation, ThPPdependant enzymes (ligases) form new C-C bonds to synthezise the highly aroma-active substance diacetyl. This article summarizes the influence of ThPP on the sensorically important substances during wine making processes.

APA, Harvard, Vancouver, ISO, and other styles

22

Məmməd oğlu Məmmədov, Şahmar, and Rinat Raviloviç Qadiyev. "Aerosol treatment of day-old chickens with vitamins and medicines." NATURE AND SCIENCE 23, no. 8 (August 17, 2022): 19–24. http://dx.doi.org/10.36719/2707-1146/23/19-24.

Full text

Abstract:

Məqalədə bir günlük cücələrin vitamin və dərman preparatları ilə aerozol müalicəsinin tətbiqi üzrə elmi tədqiqatların məlumatları verilir. A vitamini ilə müalicə edildikdə, bir günlük cücələri yağda həll olunan vitaminlərin aerozolları ilə müalicə etmək mümkün olduğu qənaətinə gəldik. Belə ki, onun ağciyər toxumasında konsentrasiyası aşağı, qanda isə eyni müalicə müddəti ilə suda həll olunan B1 vitamini ilə müqayisədə daha yüksək olmuşdur. Dispergirləşən (dağılan) mayedə farmazinin konsentrasiyasının çoxalması və emal müddətinin artırılması cücələrin ağciyər toxumasında və qaraciyərində antibiotikin konsentrasiyasının artmasına səbəb olmur. Açar sözlər: aerozol müalicəsi, dərmanlar, sutkalıq cücələr, yağda həll olunan vitaminlər, farmazin Shahmar Mammad Mammadov Rinat Ravilovich Gadiyev Aerosol treatment of day-old chickens with vitamins and medicines Abstract The article presents the data of scientific research on the use of aerosol treatment with vitamins and medicines of day-old chickens. When treated with vitamin A, it was concluded that it was possible to treat day-old chickens with aerosols of fat-soluble vitamins, since its concentration in the lung tissue was lower and in the blood was higher compared to water-soluble vitamin B1 with the same duration of treatment. An increase in the concentration of pharmazine in the dispersed liquid and an increase in the duration of treatment do not cause an increase in the concentration of the antibiotic in the lung tissue and liver of chickens. Keywords: aerosol treatment, medications, daily chickens, fat-soluble vitamins, pharmazine

APA, Harvard, Vancouver, ISO, and other styles

23

Heinrich, Edith, and Nikola Getoff. "Mitomycin C-Activity Effected by Vitamins B1, C, E and β-Carotene under Irradiation with γ-Rays." Zeitschrift für Naturforschung C 58, no. 3-4 (April 1, 2003): 244–48. http://dx.doi.org/10.1515/znc-2003-3-418.

Full text

Abstract:

Vitamin B1 (thiamine) can essentially effect the activity of mitomycin C (MMC), added individually or in combination with antioxidant vitamins (C, E-acetate, β-carotene) as found in experiments in vitro (Escherichia coli bacteria, AB 1157) under irradiation with γ-rays. The environment plays a crucial role. In airfree media vitamin B1 leads to a 2-fold increase of the MMC-efficiency, but adding vitamin C it decreases. In the presence of all vitamins (B1, C, E-ac., and β-carotene) the MMC-action increases about 1.8-fold. In aerated media vitamin B1 causes an about 4-times increase of the MMC-efficiency, but by adding vitamin B1 and C the MMC-activity decreases by a factor of two, whereas in the presence of B1, C, E-ac., and β-carotene it rises again to 2.6-fold. In environment saturated with N2O (conversion of e-aq into OH radicals) a different picture is observed. The presence of vitamin B1 or vitamin B1 + C causes a strong decrease of the MMC-efficiency, but the addition of all vitamins (B1, C, E-ac., and β-car.) leads to a small increase of the cytostatic action. The results demonstrate the influence of vitamin B1 used individually or in combination with other antioxidants on the MMC-efficiency and the strong effect of the environment. The results are of interest for the application of MMC in radiotherapy.

APA, Harvard, Vancouver, ISO, and other styles

24

Desport, Jean Claude, Christine Cazelles-Boudier, Bernard Devalois, Patrick Dolan, and Hayat Lotfi. "Evolution des concentrations de vitamine B1 chez des patients chirurgicaux en nutrition parentérale totale recevant les apports quotidiens recommandés par l'AMA." Nutrition Clinique et Métabolisme 9, no. 2 (January 1995): 79–86. http://dx.doi.org/10.1016/s0985-0562(05)80286-9.

Full text

APA, Harvard, Vancouver, ISO, and other styles

25

Kallali, Abdelali, Aziza Ouzaa, Manar Rhemimet, Sarah Boujida, and Aziz Baidada. "SYNDROME DE GAYET-WERNICKE PAR CARENCE VITAMINIQUE SUR VOMISSEMENTS GRAVIDIQUES INCOERCIBLES AVEC HYPERTHYROIDIE." International Journal of Advanced Research 9, no. 4 (April 30, 2021): 1022–25. http://dx.doi.org/10.21474/ijar01/12799.

Full text

Abstract:

Lencephalopathie de Wernicke est causee par une carence severe en thiamine il est surtout observe chez les patients alcooliques, Nous rapportons le cas dune femme de 34 ans a 10 SA, avec une hyperemesisgravidarum severe. Elle a presente une confusion avec surdite bilaterale brutale avec crise convulsive tonico-clonique . Limagerie magnetique par resonance a montreun aspect en faveur dun syndrome de Gayet-Wernicke, sur carence vitaminique devant le contexte de vomissements. Le diagnostic dencephalopathie de Wernicke a ete confirme plus tard par un faible taux serique de thiamine. 4 semaines plus tard , une aspiration a ete realisee apres amelioration clinique suite a une supplementation en vitamine B1 et correction de lhyperthyroidie gestationnelle. Lencephalopathie de Wernicke est une complication rare de lhyperemese gravidique. Il doit etre diagnostique le plus tot possible pour eviter des sequelles neurologiques a long terme ou le deces. Une supplementation en thiamine chez les femmes enceintes presentant des vomissements prolonges doit etre instauree. La supplementation precoce en thiamine reduira la morbidite maternelle et le taux de perte fÃƒÂ…Ã‚Â“tale.

APA, Harvard, Vancouver, ISO, and other styles

26

Baltrusch, Simone. "The Role of Neurotropic B Vitamins in Nerve Regeneration." BioMed Research International 2021 (July 13, 2021): 1–9. http://dx.doi.org/10.1155/2021/9968228.

Full text

Abstract:

Damage and regeneration naturally occur in the peripheral nervous system. The neurotropic B vitamins thiamine (B1), pyridoxine (B6), and cobalamin (B12) are key players, which maintain the neuronal viability in different ways. Firstly, they constantly protect nerves against damaging environmental influences. While vitamin B1 acts as a site-directed antioxidant, vitamin B6 balances nerve metabolism, and vitamin B12 maintains myelin sheaths. However, nerve injury occurs at times, because of an imbalance between protective factors and accumulating stress and noxae. This will result in the so-called Wallerian degeneration process. The presence of vitamins B1, B6, and B12 paves the way out to the following important regeneration by supporting the development of new cell structures. Furthermore, vitamin B1 facilitates the usage of carbohydrates for energy production, whereas vitamin B12 promotes nerve cell survival and remyelination. Absence of these vitamins will favor permanent nerve degeneration and pain, eventually leading to peripheral neuropathy.

APA, Harvard, Vancouver, ISO, and other styles

27

Fenti, Fenti, Agustinus Widodo, and Jamaluddin Jamaluddin. "ANALYSIS OF VITAMIN B-COMPLEX OF EEL FISH (ANGUILLA MARMORATA (Q.) GAIMARD) ON ELVER PHASE ORIGIN LAKE POSO." Ghidza: Jurnal Gizi dan Kesehatan 2, no. 2 (January 10, 2019): 49. http://dx.doi.org/10.22487/gjgk.v2i2.11321.

Full text

Abstract:

Background & Objective: Vitamins are complex organic substances that are needed by the body in small amounts, usually cannot be synthesized by the body but are important in metabolic processes one of which is vitamin B. Vitamin B consists of vitamins B1, B2, B3, B6, B9 and B12. Eel is one of the fish that has a high nutrient content, one of which is vitamin B. This study aims to determine the levels of vitamin B (B1, B2, B3, B6, B9 and B12) in Eel fish (Anguilla marmorata (Q.) Gaimard) on Elver phase from Lake Poso. Material and Methods: Determination of vitamin B1, B2, B3, B6 and B9 using HPLC (High Performance Liquid Chromatography), and vitamin B12 using LC-MS (Liquid Chromatography-Mass Spectrometry) . Results: The levels of vitamin B2, B3 and B12is 0.133 mg/100g, 1.895 mg/100g, and 0.017mg/100g, whereas in vitamin B1, B6 and B9 is not detected. Conclusion: Eel fish (Anguilla marmorata (Q.) Gaimard) on Elver phase from Lake Poso can be used as a source of vitamins B2, B3 and B12.

APA, Harvard, Vancouver, ISO, and other styles

28

Putri, Rejeki Geubrina, Muhammad Nasir, and Abdul Gani. "ANALYSIS OF VITAMIN C AND B1 LEVELS IN SENDUDUK FRUIT (Melastoma malabathricum L.) USING UV-VIS SPECTROPHOTOMETRY METHOD." Chimica Didactica Acta 8, no. 2 (October 6, 2021): 49–54. http://dx.doi.org/10.24815/jcd.v8i2.23028.

Full text

Abstract:

The fruit of "senduduk" contains a variety of nutrients and vitamins including vitamin C and B1. This study aims to determine the levels of vitamins C and B1 in young and ripe senduduk fruit that grows in coastal areas and in the mountains. The sample of the fruit was extracted with water. The absorbance of the extract of the fruit was then measured using UV-Vis spectrophotometry for vitamin C at a wavelength of 250 nm, while for vitamin B1 was measured at 420 nm. The results showed that vitamin C levels were (G1 = 0.34; G2 = 0.29%; P1 = 0.35; and P2 = 0.31)%, vitamin B1 was (G1 = 0.21; G2 = 0, 10%; P1 = 0.28; and P2 = 0.18)%. The results of the study can be concluded that there is a significant difference in vitamin C levels between young and old fruit, but it is not significantly different for the difference in the place of growth. There is a significant difference in vitamin B1 levels between young and ripe senseng fruit.

APA, Harvard, Vancouver, ISO, and other styles

29

Domenech, Joseph, and Pierre Formenty. "Le syndrome nerveux des ovins en Côte-d'Ivoire. II. Importance économique, essais et analyse coûts-bénéfices de plans de prophylaxie." Revue d’élevage et de médecine vétérinaire des pays tropicaux 46, no. 3 (March 1, 1993): 513–20. http://dx.doi.org/10.19182/remvt.9460.

Full text

Abstract:

Le syndrome nerveux des ovins en Côte d'Ivoire a été présenté pour ses aspects cliniques et épidémiologiques, dans un premier article et il a été assimilé à la nécrose du cortex cérébral liée à une carence en vitamine B1. Les pertes économiques dues à cette maladie s'élèvent de 1500 à 2000 F CFA (30 à 40 FF) par animal entretenu et par an, ce qui justifiait que l'on se penche sur le problème de la prophylaxie. Un programme d'injection hebdomadaire de 100 mg de chlorhydrate de thiamine, pendant toute la durée de la saison sèche, s'est révélé très efficace. De plus, ce programme s'avère rentable pour l'éleveur, si le coût de l'acte (injection) proprement dit n'est pas compté. Si on inclut uniquement le prix du produit, le calcul montre un taux de rémunération des investissements (rapport des bénéfices sur les coûts du programme) de 4,8 (coût de la thiamine à 400 F CFA) à 30,6 (Coût de la thiamine à 66 F CFA). Les autres critères de rentabilité (valeur actualisée nette différentielle et gains induits) etudiés démontrent le même effet positif du schéma de prophylaxie testé.

APA, Harvard, Vancouver, ISO, and other styles

30

Sabaruddin, Sabaruddin, Umy Kurniati Rasyid, Whyllies Agung Buana, Meike Pakaya, and Fitriana Nur Husain. "Optimasi dan Validasi Metode KCKT untuk Identifikasi dan Penetapan Kadar Vitamin B1, B3, B6, dan Kofein dalam Suplemen Kesehatan." Journal of Experimental and Clinical Pharmacy (JECP) 2, no. 2 (August 31, 2022): 115. http://dx.doi.org/10.52365/jecp.v2i2.425.

Full text

Abstract:

Uji identifikasi dan penetapan kadar merupakan salah satu persyaratan mutu suplemen kesehatan yang mengandung vitamin B1, B3, B6, dan kofein sehingga diperlukan metode analisis yang optimal untuk mendeteksi secara simultan analit-analit tersebut dalam suatu campuran matriks. Saat ini telah tersedia metode analisa KCKT sistem gradien untuk pengujian tersebut. Namun, dari metode analisa tersebut diperoleh profil kromatogram yang belum optimal dengan nilai resolusi 0,844 pada puncak analit vitamin B3 dan B1. Hal ini disebabkan masih berhimpitnya puncak kedua analit dan tidak terpisah dengan baik pada baseline kromatogram. Oleh karena itu dianggap perlu untuk melakukan optimasi pada metode analisa ini dengan melakukan modifikasi perbandingan komposisi fase gerak sistem gradien pada menit terelusinya vitamin B3 dan B1. Metodologi penelitian menggunakan penelitian eksperimental laboratorium dengan parameter yang diamati adalah profil kromatogram pemisahan puncak analit dan nilai resolusi antara vitamin B3 dan B1. Berdasarkan data hasil optimasi diperoleh komposisi fase gerak ammonium asetat : asetonitril (25:75) yang memberikan profil kromatogram optimal terhadap pemisahan vitamin B3 dan B1 dengan nilai resolusi 7,230 untuk vitamin B3 dan 3,427 untuk vitamin B1 (syarat resolusi > 2). Metode optimasi kemudian dilanjutkan dengan validasi metode analisa dengan hasil uji parameter selektifitas, akurasi, presisi, linearitas, nilai LOD, dan nilai LOQ memenuhi syarat keberterimaan sehingga metode ini dapat digunakan untuk melakukan pengujian identifikasi dan penetapan kadar vitamin B1, B3, B6, dan kofein dalam sediaan suplemen kesehatan.Identification and assay tests are one of the quality requirements of health supplements containing vitamins B1, B3, B6, and caffeine, so an optimal analytical method is needed to detect these analytes simultaneously in a matrix mixture. Currently, a gradient system HPLC analysis method is available for this test. However, from this analysis method, the chromatogram profile was not optimal with a resolution value of 0.844 at the peak of the vitamin B3 and B1 analytes. This is because the peaks of the two analytes are still close together and are not well separated on the baseline chromatogram. Therefore, it is considered necessary to optimize this analytical method by modifying the ratio of the mobile phase composition of the gradient system at the minute of elution of vitamins B3 and B1. The research methodology used experimental laboratory research with the parameters observed were the chromatogram profile of analyte peak separation and the resolution value between vitamins B3 and B1. Based on the optimization data, the mobile phase composition of ammonium acetate: acetonitrile (25:75) provides an optimal chromatogram profile for the separation of vitamins B3 and B1 with a resolution value of 7,230 for vitamin B3 and 3,427 for vitamin B1 (resolution > 2). The optimization method is then followed by validation of the analytical method with the test results of the parameters of selectivity, accuracy, precision, linearity, LOD value, and LOQ value meeting the acceptance requirements so that this method can be used to test the identification and determination of vitamin B1, B3, B6, and caffeine levels. in the preparation of health supplements.

APA, Harvard, Vancouver, ISO, and other styles

31

Salvati, Louis M., Sean C. McClure, Todime M. Reddy, and Nicholas A. Cellar. "Simultaneous Determination of Total Vitamins B1, B2, B3, and B6 in Infant Formula and Related Nutritionals by Enzymatic Digestion and LC-MS/MS: Single-Laboratory Validation, First Action 2015.14." Journal of AOAC INTERNATIONAL 99, no. 3 (May 1, 2016): 776–85. http://dx.doi.org/10.5740/jaoacint.15-0315.

Full text

Abstract:

Abstract This method provides simultaneous determination of total vitamins B1, B2, B3, and B6 in infant formula and related nutritionals (adult and infant). The method was given First Action for vitamins B1, B2, and B6, but not B3, during the AOAC Annual Meeting in September 2015. The method uses acid phosphatase to dephosphorylate the phosphorylated vitamin forms. It then measures thiamine (vitamin B1); riboflavin (vitamin B2); nicotinamide and nicotinic acid (vitamin B3); and pyridoxine, pyridoxal, and pyridoxamine (vitamin B6) from digested sample extract by liquid chromatography-tandem mass spectrometry. A single-laboratory validation was performed on 14 matrixes provided by the AOAC Stakeholder Panel on Infant Formula and Adult Nutritionals (SPIFAN) to demonstrate method effectiveness. The method met requirements of the AOAC SPIFAN Standard Method Performance Requirement for each of the three vitamins, including average over-spike recovery of 99.6 ± 3.5%, average repeatability of 1.5 ± 0.8% relative standard deviation, and average intermediate precision of 3.9 ± 1.3% relative standard deviation.

APA, Harvard, Vancouver, ISO, and other styles

32

Moriya, Aya, Tsutomu Fukuwatari, Mitsue Sano, and Katsumi Shibata. "Different variations of tissue B-group vitamin concentrations in short- and long-term starved rats." British Journal of Nutrition 107, no. 1 (June 27, 2011): 52–60. http://dx.doi.org/10.1017/s0007114511002339.

Full text

Abstract:

Prolonged starvation changes energy metabolism; therefore, the metabolic response to starvation is divided into three phases according to changes in glucose, lipid and protein utilisation. B-group vitamins are involved in energy metabolism via metabolism of carbohydrates, fatty acids and amino acids. To determine how changes in energy metabolism alter B-group vitamin concentrations during starvation, we measured the concentration of eight kinds of B-group vitamins daily in rat blood, urine and in nine tissues including cerebrum, heart, lung, stomach, kidney, liver, spleen, testis and skeletal muscle during 8 d of starvation. Vitamin B1, vitamin B6, pantothenic acid, folate and biotin concentrations in the blood reduced after 6 or 8 d of starvation, and other vitamins did not change. Urinary excretion was decreased during starvation for all B-group vitamins except pantothenic acid and biotin. Less variation in B-group vitamin concentrations was found in the cerebrum and spleen. Concentrations of vitamin B1, vitamin B6, nicotinamide and pantothenic acid increased in the liver. The skeletal muscle and stomach showed reduced concentrations of five vitamins including vitamin B1, vitamin B2, vitamin B6, pantothenic acid and folate. Concentrations of two or three vitamins decreased in the kidney, testis and heart, and these changes showed different patterns in each tissue and for each vitamin. The concentration of pantothenic acid rapidly decreased in the heart, stomach, kidney and testis, whereas concentrations of nicotinamide were stable in all tissues except the liver. Different variations in B-group vitamin concentrations in the tissues of starved rats were found. The present findings will lead to a suitable supplementation of vitamins for the prevention of the re-feeding syndrome.

APA, Harvard, Vancouver, ISO, and other styles

33

Böhm, V., A. Starker, E. Weske, G. Schaarmann, R. Schubert, R. Bitsch, G. Peiker, and G. Flachowsky. "Gehalte der Vitamine B1, B2, A und E sowie β-Carotin in transitorischer Frauenmilch und Vergleichsuntersuchungen im Blut der Mütter und im Nabelschnurblut." Zeitschrift für Ernährungswissenschaft 36, no. 3 (September 1997): 214–19. http://dx.doi.org/10.1007/bf01623366.

Full text

APA, Harvard, Vancouver, ISO, and other styles

34

Potolitsyna, N. N., and E. R. Boyko. "VITAMIN STATUS OF LAW ENFORCEMENT OFFICERSUNDER THE INFLUENCE OF COMBAT STRESS." Marine Medicine 4, no. 3 (October 7, 2018): 57–63. http://dx.doi.org/10.22328/2413-5747-2018-4-3-57-63.

Full text

Abstract:

Law enforcement officers with different levels of combat stress (men, residents of the Komi Republic, n=33, 35,0 (32,0– 39,0) years old) were examined before (November) and after (March) trips to the combat zone. The control group included agents of the Ministry of emergency situations with a low level of stress (men, residents of the Komi Republic, 32,0 (30,0–35,0) years old). In total, law enforcement officers were shown to have a wide prevalence of vitamin deficiency: about 50% of persons had hypovitaminosis for vitamins A, E, about 35% — for vitamins B1, B2 and 24% — for vitamin C. A parallel study of the control group and law enforcement officers in November showed that initially there were more persons with reduced vitamin status in law enforcement officers, especially in the level of vitamins B1 and E. In March, after the arrival of law enforcement officers from the combat zone, they found a significant decrease in the percentage of persons with hypovitaminosis for vitamins A, E, C and an increase vitamin B1 deficiency. Changes vitamin status in the control group from November to March were not so significant.

APA, Harvard, Vancouver, ISO, and other styles

35

Kaczkan, Małgorzata, Sylwia Czaja-Stolc, Małgorzata Szczuko, Arleta Drozd, Przemysław Rutkowski, Alicja Dębska-Ślizień, and Sylwia Małgorzewicz. "Water-Soluble Vitamins Status in Patients Undergoing Maintenance Hemodialysis." Nutrients 15, no. 2 (January 14, 2023): 440. http://dx.doi.org/10.3390/nu15020440.

Full text

Abstract:

The concentration of water-soluble vitamins (except folic acid and vitamin B12) is not routinely measured, which may lead to undiagnosed deficiencies among hemodialysis (HD) patients. The aim of the study was to assess the blood concentration of water-soluble vitamins in HD patients in comparison with healthy subjects and to assess the impact of diabetes mellitus (DM) coexistence on the concentration of these vitamins. The two-center study included 142 HD patients and a control group of 31 healthy subjects. Vitamins concentration was determined using high-performance liquid chromatography (HPLC). Vitamin B1, B6, and B12 levels were significantly lower in the HD group than in the control group (p < 0.001). Vitamin B1 and B2 were negatively correlated with blood urea nitrogen (BUN) levels before HD (R = −0.39, R = −0.38; p < 0.05). Vitamin B3, B12, and C were positively correlated with the albumin concentration (R = 0.26, R = 0.27, R = 0.28; p < 0.05). Among diabetic patients, only the concentration of vitamin B1 was lower than among non-diabetic patients. The concentration of water-soluble vitamins may be related to the adequacy of dialysis, the time of laboratory determination since the last dialysis, diet, coexistence of other diseases, use of drugs, and dietary supplements in individual patients.

APA, Harvard, Vancouver, ISO, and other styles

36

Shibata, Katsumi, Atsushi Shimizu, and Tsutomu Fukuwatari. "Vitamin B1 Deficiency Does not Affect the Liver Concentrations of the Other Seven Kinds of B-Group Vitamins in Rats." Nutrition and Metabolic Insights 6 (January 2013): NMI.S11749. http://dx.doi.org/10.4137/nmi.s11749.

Full text

Abstract:

We aimed to determine the effects of vitamin B1 deficiency on vitamin contents of urine, liver, and blood. In the current study, rats were divided into 3 groups (n = 5, each group): the first was freely fed a complete diet (ad lib-fed control group); the second freely fed a vitamin B1-free diet (vitamin B1 deficient group); and the third pair-fed a complete diet with the same amounts of the vitamin B1 deficient group (pair-fed control group). The experimental period was for 15 days. The blood concentrations of vitamin B2, PLP, vitamin B12, folic acid, and biotin were lower in the pair-fed control than in the ad lib-fed control and those of nicotinamide and pantothenic acid were the same. We conclude that Vitamin B1 deficiency did not affect concentrations of the other B-group vitamins.

APA, Harvard, Vancouver, ISO, and other styles

37

Hoffmann, Jessica, Stefan Busse, Franz von Hoff, Katrin Borucki, Thomas Frodl, and Mandy Busse. "Association Between Homocysteine and Vitamin Levels in Demented Patients." Journal of Alzheimer's Disease 81, no. 4 (June 15, 2021): 1781–92. http://dx.doi.org/10.3233/jad-201481.

Full text

Abstract:

Background: Although it is known that the nutritional status among elderly persons and, in particular, patients with dementia, is compromised, malnutrition that results in insufficient uptake of several vitamins is often not diagnosed. Objective: An elevated homocysteine level is a known strong risk factor for vascular dementia (VaD) and Alzheimer’s disease (AD). Several B vitamins are involved in the metabolism of homocysteine. Therefore, we investigated the serum levels of vitamin B1, vitamin B6, folate, and vitamin B12 in 97 patients with mild cognitive impairment (MCI) or different forms of dementia and 54 elderly control persons without dementia. Results: Compared to aged non-demented people, vitamins B1, B6, B12, and folate were decreased in serum of patients with AD, and patients with Lewy body dementia had reduced vitamin B12 level. Vitamin B6 was diminished in VaD. Patients with frontotemporal dementia showed no alterations in vitamin levels. Age was identified as an important factor contributing to the concentrations of vitamin B1 and B6 in serum, but not vitamin B12 and folate. Increased levels of total homocysteine were detected especially in MCI and AD. Homocysteine correlated negatively with levels of vitamins B6, B12, and folate and positively with Q Albumin. Conclusion: Our data suggest that despite increased homocysteine already present in MCI, vitamin levels are decreased only in dementia. We propose to determine the vitamin levels in patients with cognitive decline, but also elderly people in general, and recommend supplementing these nutrients if needed.

APA, Harvard, Vancouver, ISO, and other styles

38

Vilms, E. A., D. V. Turchaninov, T. A. Yunatskaya, and I. A. Sokhoshko. "ASSESSMENT OF VITAMIN PROVISION OF THE POPULATION OF THE LARGE ADMINISTRATIVE AND ECONOMIC CENTER OF THE WESTERN SIBERIA." Hygiene and sanitation 96, no. 3 (March 27, 2019): 277–80. http://dx.doi.org/10.18821/0016-9900-2017-96-3-277-280.

Full text

Abstract:

Evaluation of vitamin status in residents of the Omsk city (106 men and 135 women) aged of from 18 to 75 years according to the serum content of vitamins A, D, E, K, C, B1, B5, B6, B9, B12. Lack of vitamins in the majority of the observed cases (63.2 ± 3.8%) had a combined character. There was revealed pronounce lack of vitamin D and folic acid, respectively in 70.9 ± 3.6% and 63.2 ± 5.6% of observed persons. The substantial proportion of the population was found to suffer from lacks of vitamin B1 (47.5 ± 4.2%), B6 (49.7 ± 3.8%), and vitamin E (47.1 ± 4.0%). The frequency of detection of a reduced availability of vitamin C was 16.2 ± 3.4%, B12 - 13.2 ± 3.2%, respectively. The deficiency of vitamin A deficiency was seldom (from 5.8 ± 1.9%). In the sample no person with a deficiency of vitamin K and pantothenic acid (B5) was revealed. Mediane of concentrations of phylloquinone, retinol and ascorbic acid and cyanocobalamin in blood serum were in the range of optimum values. Borderline values of the content (at the level of the lower limit of normal) were seen for vitamin E, B1, B6. There were found age differences in the availability of vitamins E, K, ascorbic acid.

APA, Harvard, Vancouver, ISO, and other styles

39

Bévier, Alban, Etienne Novel-Catin, Emilie Blond, Solenne Pelletier, Francois Parant, Laetitia Koppe, and Denis Fouque. "Water-Soluble Vitamins and Trace Elements Losses during On-Line Hemodiafiltration." Nutrients 14, no. 17 (August 23, 2022): 3454. http://dx.doi.org/10.3390/nu14173454.

Full text

Abstract:

Maintenance hemodialysis induces water-soluble vitamins and trace elements losses, which is why recommendations regarding potential supplementation were provided, but mainly based on conventional hemodialysis. This study′s aim was to measure the water–soluble vitamins and trace element losses during one on-line post-dilution hemodiafiltration (HDF) session. Thirty-nine patients under maintenance HDF were enrolled. We used the Theraflux® sampler (Theradial Corp., Orvault, France) to analyze the full session dialysate mass transfer. Blood and dialysate samples were collected before and after one HDF session to measure B1, B2, B6, B9, B12, C vitamins, zinc, and selenium concentrations. Values significantly decreased for B1 (20.2%), B2 (13%), B6 (25.4%), B9 (32.6%), C (66.6%) and selenium (6.7%). No significant differences were found for vitamin B12 and zinc. The dialysate losses per session were 1.12 ± 0.88 mg for vitamin B1, 0.28 ± 0.30 mg for B2, 0.33 ± 0.09 mg for B6, 0.3 ± 0.18 mg for B9, 147.5 ± 145.50 mg for C and 25.75 ± 6.91 mg for zinc. Vitamin B12 and selenium were under detection values. In conclusion, during a standard 4hr-HDF session, we found important losses for vitamin B1, B6, B9, C and zinc, suggesting the need for regular monitoring of plasma levels and systematic supplementation of these compounds.

APA, Harvard, Vancouver, ISO, and other styles

40

SIERRA, ISABEL, and CONCEPCIÓN VIDAL-VALVERDE. "Vitamin B1 and B6 Retention in Milk after Continuous-Flow Microwave and Conventional Heating at High Temperatures." Journal of Food Protection 64, no. 6 (June 1, 2001): 890–94. http://dx.doi.org/10.4315/0362-028x-64.6.890.

Full text

Abstract:

The effect of continuous-flow microwave treatment at high temperatures on the retention of vitamins B1 and B6 in raw milk with different fat content was evaluated. Results were compared with those obtained using a conventional system (tubular heat exchanger) with the same heating and cooling phases. Heat treatment of whole (3.4% fat) and skim (0.5% fat) milk at 90°C produced no losses of vitamin B1 or vitamin B6 (pyridoxamine and pyridoxal). However, at 110 and 120°C, while vitamin B1 content of milk remained constant, pyridoxamine increased (4 to 5% and 9 to 11%, respectively) and pyridoxal decreased (5 to 6% and 9 to 12%, respectively). Under the assayed conditions, no differences were observed between the content of these vitamins in conventionally and continuous-flow microwave-treated milk.

APA, Harvard, Vancouver, ISO, and other styles

41

Navrátilová, Pavlína, Ivana Borkovcová, Lenka Kaniová, Sandra Dluhošová, and Hana Zachovalová. "The content of selected vitamins and iodine in mare’s milk." Acta Veterinaria Brno 88, no. 4 (2019): 473–80. http://dx.doi.org/10.2754/avb201988040473.

Full text

Abstract:

The aim of the study was to contribute to scarce literature data on the content of selected vitamins and iodine in mare’s milk. The study focused on the content of selected lipophilic vitamins (A, E), hydrophilic vitamins B1, B2, B6) and iodine in milk samples obtained from 8 mares during 6 months of lactation. The content of micronutrients was evaluated according to the stage of lactation. Vitamins B2 and B6 were determined using ion-pair reversed phase high performance liquid chromatography with fluorescence detection, vitamin B1 by fluorescence detection by reversed-phase liquid chromatography, vitamins A and E by the ultra-high performance liquid chromatography method with ultraviolet and fluorescence detection and iodine by the spectrophotometric method. Mean concentrations of vitamins A (0.06 ± 0.08 mg/l), E (0.083 ± 0.14 mg/l), B1 (256.24 ± 44.19 µg/l), B2 (111.40 ± 81.88 µg/l), B6 (0.30 ± 0.12 mg/l) reached lower values in mare’s milk compared to cow’s milk. The mean value of iodine in mare’s milk reached 44.48 ± 54.45 µg/l. Lactation stage proved to be a significant factor for vitamin B6 and iodine.

APA, Harvard, Vancouver, ISO, and other styles

42

Wake, Taichi, Jun Kunisawa, Eri Hashimoto, Yuji Suzuki, and Hiroshi Kiyono. "Vitamin B1 is an essential survival factor for naïve B cells but not IgA-secreting plasma cells (120.9)." Journal of Immunology 188, no. 1_Supplement (May 1, 2012): 120.9. http://dx.doi.org/10.4049/jimmunol.188.supp.120.9.

Full text

Abstract:

Abstract It is generally accepted that dietary factors contribute in the regulation of various immunological functions. Among different kinds of dietary materials, vitamin families such as vitamin A, B6, B9, and D3 play critical regulatory roles for immune responses, but the immunological functions of the other vitamins remain largely unknown. Here, we demonstrate that vitamin B1, also known as thiamine, is an essential factor to keep naïve B cells but not IgA-secreting plasma cells. When mice were maintained with vitamin B1-deficient diet, IgM+ B220+ naïve B cells were significantly decreased in the spleen, mesenteric lymph nodes, and Peyer’s patches, while B220- CD138+ plasma cells secreting IgA antibodies were normally present in the small intestine. In agreement with this finding, despite the reduction of naïve B cells, levels of antigen-specific intestinal IgA responses were unchanged in mice receiving vitamin B1(-) diet after oral immunization with Choleratoxin. Similarly, IgA-secreting cells normally produced IgA even in the absence of vitamin B1 in vitro. These findings demonstrate a new immunological function of vitamin B1 at the different B cell stages.

APA, Harvard, Vancouver, ISO, and other styles

43

Talwar, Dinesh K., Mohammed K. Azharuddin, Cathy Williamson, Yee Ping Teoh, Donald C. McMillan, and Denis St. J. O’Reilly. "Biological Variation of Vitamins in Blood of Healthy Individuals." Clinical Chemistry 51, no. 11 (November 1, 2005): 2145–50. http://dx.doi.org/10.1373/clinchem.2005.056374.

Full text

Abstract:

Abstract Background: Components of biological variation can be used to define objective quality specifications (imprecision, bias, and total error), to assess the usefulness of reference values [index of individuality (II)], and to evaluate significance of changes in serial results from an individual [reference change value (RCV)]. However, biological variation data on vitamins in blood are limited. The aims of the present study were to determine the intra- and interindividual biological variation of vitamins A, E, B1, B2, B6, C, and K and carotenoids in plasma, whole blood, or erythrocytes from apparently healthy persons and to define quality specifications for vitamin measurements based on their biology. Methods: Fasting plasma, whole blood, and erythrocytes were collected from 14 healthy volunteers at regular weekly intervals over 22 weeks. Vitamins were measured by HPLC. From the data generated, the intra- (CVI) and interindividual (CVG) biological CVs were estimated for each vitamin. Derived quality specifications, II, and RCV were calculated from CVI and CVG. Results: CVI was 4.8%–38% and CVG was 10%–65% for the vitamins measured. The CVIs for vitamins A, E, B1, and B2 were lower (4.8%–7.6%) than for the other vitamins in blood. For all vitamins, CVG was higher than CVI, with II <1.0 (range, 0.36–0.95). The RCVs for vitamins were high (15.8%–108%). Apart from vitamins A, B1, and erythrocyte B2, the imprecision of our methods for measurement of vitamins in blood was within the desirable goal. Conclusions: For most vitamin measurements in plasma, whole blood, or erythrocytes, the desirable imprecision goals based on biological variation are obtainable by current methodologies. Population reference intervals for vitamins are of limited value in demonstrating deficiency or excess.

APA, Harvard, Vancouver, ISO, and other styles

44

Coad, Ross, and Lan Bui. "Stability of Vitamins B1, B2, B6 and E in a Fortified Military Freeze-Dried Meal During Extended Storage." Foods 9, no. 1 (January 2, 2020): 39. http://dx.doi.org/10.3390/foods9010039.

Full text

Abstract:

Australian military ration packs contain a variety of processed foods, including some that are fortified with vitamins. In this study, freeze-dried meals, a key component of lightweight patrol ration packs, were fortified at the time of packing by direct addition of a vitamin premix containing vitamins B1, B2, B6 and E. Fortification was at three levels: 50%, 100% and 200% of the recommended vitamin content for military ration packs. Vitamin stability was determined following storage at temperatures of 1 °C, 30 °C and 40 °C for up to 24 months. HPLC methods were used to measure vitamin content; water activity and colour were also determined. Mean 24-month retention rates across all temperatures and fortification levels were 94%, 97%, 86% and 77% for vitamins B1, B2, B6 and E, respectively. Water activity increased with storage temperature, whereas colour changes due to fortification and storage temperature were at the threshold of visual detection. Fortification of freeze-dried meals would be an effective means of improving the quality of light weight military ration packs by addressing shortfalls in vitamin levels.

APA, Harvard, Vancouver, ISO, and other styles

45

Miyazaki, Aiko, Mitsue Sano, Tsutomu Fukuwatari, and Katsumi Shibata. "Effects of ethanol consumption on the B-group vitamin contents of liver, blood and urine in rats." British Journal of Nutrition 108, no. 6 (December 15, 2011): 1034–41. http://dx.doi.org/10.1017/s0007114511006192.

Full text

Abstract:

Several studies have shown that blood vitamin levels are lower in alcoholic patients than in control subjects. Acute ethanol exposure enhances the release of vitamins from liver cells in vitro. The aim of the present study is to confirm the effects of ethanol consumption on vitamin contents in vivo. We compared the contents of B-group vitamins in the liver, blood and urine between ethanol-fed and control rats fed a diet containing a sufficient- and low-vitamin mixture. The experimental rats were fed a 15 % ethanol solution freely for 28 d, and then 24 h urine samples were collected, after which the animals were killed. The B-group vitamin contents in the liver, blood and urine were measured. No differences in liver, blood and urine contents were observed between the control and ethanol-fed rats fed a diet containing a sufficient-vitamin mixture. On the contrary, in rats fed a diet containing a low-vitamin mixture, consumption of ethanol caused a decrease in the contents of vitamins B1, B2 and pantothenic acid in the liver; however, the contents of the other vitamins did not decrease. In the blood, the contents of vitamins B1, B2, B6 and pantothenic acid were lower in the ethanol-fed rats than in the controls. Urinary excretion of the B-group vitamins, except for niacin, was lower in the ethanol-fed rats. These results show that ethanol consumption affects the absorption, distribution and excretion of each of the vitamins in rats fed a diet containing a low-vitamin mixture.

APA, Harvard, Vancouver, ISO, and other styles

46

Souza, Ana Lúcia Pozzobon de, Geni Salete Pinto de Toledo, Paulo Tabajara Chaves Costa, and Ubiratan Gross Alencastro. "Efeitos de diferentes níveis das vitaminas tiamina, riboflavina e piridoxina sobre o desempenho de frangos de corte." Ciência Rural 26, no. 3 (December 1996): 497–500. http://dx.doi.org/10.1590/s0103-84781996000300027.

Full text

Abstract:

O experimento foi conduzido para analisar os efeitos de níveis altos e baixos das vitaminas tiamina (B1), riboflavina (B2) e piridoxina (B6) sobre o desempenho de frangos de corte. Um total de 576 pintos de corte de um dia, foram distribuídos em desenho experimental trifatorial (2³), inteiramente casualizado onde dois níveis (alto e baixo) de cada vitamina foram testados: vitamina B1 (A=3 mg/kg; B=2 mg/kg), vitamina B2 (A=6 mg/kg; B=4 mg/kg) e vitamina B6 (A=4,5 mg/kg; B=3 mg/kg). Deste modo, dezoito aves por tratamento (8), em quatro repetições, foram distribuídas em boxes sobre piso e receberam dietas isonutritivas, variando somente em relação às vitaminas estudadas. Os dados foram submetidos a análise de variância e teste de Tukey. Não foram observadas diferenças significativas (P>0,05) entre os tratamentos para todos os parâmetros estudados. Portanto, os resultados deste trabalho sugerem que os níveis das vitaminas B1, B2 e B6, para frangos de corte, podem ser reduzidos em até 66% dos níveis atualmente utilizados, sem prejuízo na performance dos mesmos.

APA, Harvard, Vancouver, ISO, and other styles

47

Schümann. "Interactions Between Drugs and Vitamins at Advanced Age." International Journal for Vitamin and Nutrition Research 69, no. 3 (May 1, 1999): 173–78. http://dx.doi.org/10.1024/0300-9831.69.3.173.

Full text

Abstract:

Drug consumption increases at advanced age due to increased morbidity. At the same time the state of repletion is reduced for several vitamins. Physiological and kinetic alterations in the elderly are reviewed in order to analyse possible interrelations between these two phenomena. At high age the status of all vitamins is compromised by reduced food intake. Decreased active intestinal transport and an increased propensity for atrophic gastritis may reduce the absorption of vitamins A, B1, folate and B12. Decreased exposure to sunlight and reduced cutaneous synthesis impair the vitamin D status. Studies on the state of vitamin repletion in hospital patients indicate a specific response of vitamins A, B1, B6 and C to drug administration at advanced age. Reduced food intake in the elderly is further compromised by drugs that impair appetite and absorption. Anticonvulsives and other drugs that induce hepatic microsomal enzymes accelerate vitamin D metabolism and aggravate postmenopausal osteoporosis. Acid inhibiting agents increase achlorhydria and reduce vitamin B12 absorption. Renal clearance of acidic drugs such as acetylsalicylic acid and barbituric acid, which is impaired at high age, is further reduced by high doses of vitamin C. Vitamin B6 reduces the therapeutic effect of L-dopa. When recognised, the negative effects of drug-vitamin interactions can be compensated by adequate vitamin supplementation and by adaptation of drug dosing.

APA, Harvard, Vancouver, ISO, and other styles

48

Patino-Alonso, Maria C., Marta Gómez Sánchez, Leticia Gómez Sánchez, Rosario Alonso-Domínguez, Natalia Sánchez-Aguadero, Benigna Sánchez Salgado, Emiliano Rodríguez Sánchez, Luis García Ortiz, and Manuel A. Gómez-Marcos. "Multivariate Analysis of Influence of Vitamin Intake on Vascular Function Parameters by Sex in the General Spanish Population: EVA Study." Nutrients 12, no. 3 (February 28, 2020): 643. http://dx.doi.org/10.3390/nu12030643.

Full text

Abstract:

The influence of vitamin intake on vascular function parameters in the Spanish general population has not been studied. The main objective of this study is to analyze the influence of vitamin intake on vascular function and as a secondary objective the adequacy of vitamin intake in a sample of the Spanish population without previous cardiovascular disease and analyze the differences according to sex. Methods: We included 501 individuals obtained by simple random sampling with replacement (reference population 43,946). The average age was 55.90 ± 14.24 years, 49.70% men. Participants recorded the intake of vitamins using the EVIDENT app, previously validated, during a period of 3 days. Vascular function was assessed by measuring carotid-femoral pulse wave velocity (cfPWV) with the SphygmoCor device, cardio-ankle vascular index (CAVI) with the VaSera device and brachial-ankle pulse wave velocity (baPWV) by using a validated equation. Results: The vitamins with the least adequate intake was vitamin D, less than 5%, and vitamin B9, less than 35%. Vitamins with an adequate intake percentage, close to 100%, were B12 and B6. The multiple regression analysis showed a negative association between cfPWV and vitamin B2 in both sexes, and a positive one with retinol in men and B3 in women. baPWV was negatively associated with vitamins B1 and B12 in women and B9 in men, while being positively linked with B6 in men. CAVI presented a negative association with vitamin D in women. The results were similar in the canonical correspondence analysis. In conclusion, the results of this study suggest that the influence of vitamins on vascular function is not homogeneous and varies according to the parameter analyzed. Thus, in men, vitamins B2 and retinol were associated with cfPWV and vitamins B6 and B9 with baPWV. In women, vitamins B2 and B3 were related cfPWV, vitamins B1 and B12 with cfPWV and vitamin D with CAVI.

APA, Harvard, Vancouver, ISO, and other styles

49

Fitzpatrick, Teresa B., and Lottie M. Chapman. "The importance of thiamine (vitamin B1) in plant health: From crop yield to biofortification." Journal of Biological Chemistry 295, no. 34 (June 17, 2020): 12002–13. http://dx.doi.org/10.1074/jbc.rev120.010918.

Full text

Abstract:

Ensuring that people have access to sufficient and nutritious food is necessary for a healthy life and the core tenet of food security. With the global population set to reach 9.8 billion by 2050, and the compounding effects of climate change, the planet is facing challenges that necessitate significant and rapid changes in agricultural practices. In the effort to provide food in terms of calories, the essential contribution of micronutrients (vitamins and minerals) to nutrition is often overlooked. Here, we focus on the importance of thiamine (vitamin B1) in plant health and discuss its impact on human health. Vitamin B1 is an essential dietary component, and deficiencies in this micronutrient underlie several diseases, notably nervous system disorders. The predominant source of dietary vitamin B1 is plant-based foods. Moreover, vitamin B1 is also vital for plants themselves, and its benefits in plant health have received less attention than in the human health sphere. In general, vitamin B1 is well-characterized for its role as a coenzyme in metabolic pathways, particularly those involved in energy production and central metabolism, including carbon assimilation and respiration. Vitamin B1 is also emerging as an important component of plant stress responses, and several noncoenzyme roles of this vitamin are being characterized. We summarize the importance of vitamin B1 in plants from the perspective of food security, including its roles in plant disease resistance, stress tolerance, and crop yield, and review the potential benefits of biofortification of crops with increased vitamin B1 content to improve human health.

APA, Harvard, Vancouver, ISO, and other styles

50

Lima, Hope K., Kenneth Vogel, Daniela Hampel, Montana Wagner-Gillespie, and April D. Fogleman. "The Associations Between Light Exposure During Pumping and Holder Pasteurization and the Macronutrient and Vitamin Concentrations in Human Milk." Journal of Human Lactation 36, no. 2 (April 15, 2020): 254–63. http://dx.doi.org/10.1177/0890334420906828.

Full text

Abstract:

Background During pumping, storage, and pasteurization human milk is exposed to light, which could affect the concentrations of light-sensitive vitamins. Currently, milk banks do not regulate light exposure. Research Aim The aim of this paper was to determine the influence of light exposure during pumping, storage, and pasteurization on (1) macronutrients, (2) select water-soluble vitamins, and (3) select fat-soluble vitamins. Methods All 13 participants donated 4 milk samples each. Each sample underwent 1 of 4 treatments: raw and light protected, raw and light exposed, pasteurized and light protected, and pasteurized and light exposed. Samples were analyzed for macronutrients and Vitamins B1, B2, retinol, γ-tocopherol, α-tocopherol, and β-carotene. Results β-carotene concentrations were not influenced by light exposure. Vitamin B1 was significantly ( p < 0.05) affected by light-exposure ( M = 0.23, SD = 0.01mg/L) compared to light-protected ( M = 0.27, SD = 0.01mg/L) samples. Vitamin B2 concentrations were reduced ( p < 0.05) by light-exposure in raw ( M = 62.1, SD = 0.61µg/L) and pasteurized ( M = 73.7, SD = 0.72µg/L) samples compared to light-protected raw samples ( M = 99.7, SD = 0.66µg/L). No other tested nutrients were affected by light exposure. Conclusions If milk is exposed to excessive amounts of light, Vitamins B1 and B2 concentrations may degrade below the current Adequate Intake recommendations for infants 0–6 months of age, increasing the risk of insufficient vitamin supply to the exclusively human milk-fed infant. Thus, pumped or processed human milk should be protected from light to preserve milk vitamin concentrations.

APA, Harvard, Vancouver, ISO, and other styles

Journal articles on the topic 'Vitamine B1'

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles